Having a sort out, it surprised me how many sets were released without ending. Those I would have liked to have seen more of were:

Charmed - only one season and then derivatives.
Gotham - only two seasons.
Once Upon a Time - only one season.
Agents of S.H.I.E.L.D (Rittenhouse) - only two seasons.

These are only the ones that have hoved into view, but I dare say there are others. Anyone got any more they would have liked to have completed?

Alias - only needed season 5 to complete the series and I really wanted a Rachel Nichols autograph card .